Gemoro CZ Master Set Pro 2 - 0.5CT 10 Stone Set for comparison and grading Largest range of reference available: E, F, G, H, I, J, K, L, M and N comparison stones Expertly graded using the GIA grading scale. Color Grade laser inscribed on the stones table Each stone is treated with GemOros ColorLast technology ensuring permanent color saturation. INCLUDED: White and yellow solitaire ring stone holder set included for comparing mounted stones. INCLUDED: Illumnated Grading and Storage Case with Grading Tray and Daylight/UV LED's